> A string is a string - the user's input will have the ratioValue property > available. > > Up to you to sanity check the user input of course. > > Kirk Kerekes > (iPhone) > > On May 30, 2014, at 4:56 PM, Trygve Inda <cocoa...@xericdesign.com> wrote: > >>> Create a property-styled category on NSString that returns the numeric value >>> of a ratio-string -- call it "ratioValue" perhaps. Then you can have a >>> predicate format of the form: >>> >>> @"self.ratioValue > %@.ratioValue" >>> >>> -- or whatever. >>> >>> The same category would be useful in KVC collection operations. >>> >>> Kirk Kerekes >>> (iPhone) >> >> As a followup: >> >> I can make the lefExpression keypath "aspectRatio.ratioValue" >> >> But how would I make what the User enters in the Predicate Editor text field >> pass through the ratioValue method? >> >> If I just change the leftExpression to "aspectRatio.ratioValue" that changes >> one side of the comparison, but what the user has entered is still a string >> like "4:3".
So I set it up like: leftExpressions = [NSArray arrayWithObject: [NSExpression expressionForKeyPath:@"aspectRatio.ratioValue"]]; NSPredicateEditorRowTemplate* template = [[NSPredicateEditorRowTemplate alloc] initWithLeftExpressions:leftExpressions rightExpressionAttributeType:NSStringAttributeType modifier:NSDirectPredicateModifier operators:operators options:0]; It looks like it is only using the ratioValue on the left side so that I end up comparing "1.333333" to "4:3" T. _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
